Caption: This colour enhanced axial cross sectional MRI image beautifully demonstrates the 7th and 8th cranial nerve complexes within the internal auditory canals (IAC). This MRI sequence is called a CISS sequence and is a highly specialized sequence to look at these nerves when people have complaints of hearing loss. Sometimes hearing loss is the result of a tumor involving the 8th nerve in the internal auditory canal which is called a vestibular schwannoma or acoustic neuroma. MRI is the best method to diagnose this problem.